for reference this is the items I am asking about… seen it referred to as different names.
Curio Containers
The Underpin has stolen Brann’s curios, smashed them, and hidden them in delves. Curio Containers can be found throughout delves. Opening these offerers an extra power which is a fragment of one of the broken curios.
Examples…
Upon entering combat, players gain the following:
Massive
Increases your size by 20%, maximum health by 10%, and damage and healing done by 6%.
(https://www.wowhead.com/spell=1214334/miniature-shards-of-amorphous-relic)
Upon entering combat, players gain the following:
Miniature
Reduces your size by 20%, increases movement speed by 10%, and your haste by 6%.
I can not find if these stack or you are only allowed one to be active at a time. I see that you can “Hide” them, but if they do stack why would you hide them? I find lots of references that these work the same as Season 1, but never go into detail on what Season 1 was.